These sort of conjunctions and occultations of the moon and large planets like Jupiter and Saturn happen on a semi-regular basis. There is a great free program called stellarium online that shows you how the sky moves in real time.
You can forecast these events in plenty of time and get set up for them. A really great shot is to try to capture a planet being cut in half by the dark side of the moon. It gives great perspective.
By the way, I didn't take these. Just google images of occultations.
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